1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/types.h>
27 #include <sys/kmem.h>
28 #include <sys/async.h>
29 #include <sys/sysmacros.h>
30 #include <sys/sunddi.h>
31 #include <sys/sunndi.h>
32 #include <sys/ddi_impldefs.h>
33 #include <sys/ddi_implfuncs.h>
34 #include <sys/pci/pci_obj.h>
35 #include <sys/pci.h>
36 #include <sys/pci_cap.h>
37
38 /*LINTLIBRARY*/
39
40 void
pcix_set_cmd_reg(dev_info_t * child,uint16_t value)41 pcix_set_cmd_reg(dev_info_t *child, uint16_t value)
42 {
43 uint16_t pcix_cap_ptr, pcix_cmd;
44 ddi_acc_handle_t handle;
45
46 if (pci_config_setup(child, &handle) != DDI_SUCCESS)
47 return;
48
49 /*
50 * Only modify the Command Register of non-bridge functions.
51 */
52 if ((pci_config_get8(handle, PCI_CONF_HEADER) & PCI_HEADER_TYPE_M)
53 == PCI_HEADER_PPB)
54 goto teardown;
55
56 if (PCI_CAP_LOCATE(handle, PCI_CAP_ID_PCIX, &pcix_cap_ptr) ==
57 DDI_FAILURE)
58 goto teardown;
59
60 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: pcix_cap_ptr = %x\n",
61 pcix_cap_ptr);
62
63 /*
64 * Read the PCI-X Command Register.
65 */
66 if ((pcix_cmd = PCI_CAP_GET16(handle, 0, pcix_cap_ptr, 2))
67 == PCI_CAP_EINVAL16)
68 goto teardown;
69
70 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register "
71 "(Before) %x\n", pcix_cmd);
72
73 pcix_cmd &= ~(0x1f << 2); /* clear bits 6-2 */
74 pcix_cmd |= value;
75
76 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register "
77 "(After) %x\n", pcix_cmd);
78
79 PCI_CAP_PUT16(handle, 0, pcix_cap_ptr, 2, pcix_cmd);
80
81 teardown:
82 pci_config_teardown(&handle);
83 }
84